Why did you recommend online wallet like coinbase as it is not a wallet it's an exchange site.

If you are guys want to hold different coins I suggest you guys use official wallet because it is recommended and the other wallet's that you have full control over the private keys is electrum for bitcoin.

Mycelium also good as I use it as my alternative wallet when I am outside in my house.

Hardware wallets are best for holding different coins if you want to stay your coins longer this is the best wallet like ledger nano S.